Gary Schafer has done my Whitetails and his work is as good as it gets. Some specialize so I can't say the best Moose taxidermist but I would bet his would be as good or better than as any you find. Not cheap and not quick if that is what you are after. He is out by Leslieville.
Sugar creek! Marco does awesome work. Not sure how many moose he has done but I am sure you will be happy when it’s completed! No idea what hat it would cost, check him out ! Tell him his neighbor up the street recommended him.